ACPICA 20050708 from Bob Moore <robert.moore@intel.com>

The use of the CPU stack in the debug version of the
subsystem has been considerably reduced.  Previously, a
debug structure was declared in every function that used
the debug macros.  This structure has been removed in
favor of declaring the individual elements as parameters
to the debug functions.  This reduces the cumulative stack
use during nested execution of ACPI function calls at the
cost of a small increase in the code size of the debug
version of the subsystem.  With assistance from Alexey
Starikovskiy and Len Brown.

Added the ACPI_GET_FUNCTION_NAME macro to enable the
compiler-dependent headers to define a macro that will
return the current function name at runtime (such as
__FUNCTION__ or _func_, etc.) The function name is used
by the debug trace output.  If ACPI_GET_FUNCTION_NAME
is not defined in the compiler-dependent header, the
function name is saved on the CPU stack (one pointer per
function.) This mechanism is used because apparently there
exists no standard ANSI-C defined macro that that returns
the function name.

Alexey Starikovskiy redesigned and reimplemented the
"Owner ID" mechanism used to track namespace objects
created/deleted by ACPI tables and control method
execution.  A bitmap is now used to allocate and free the
IDs, thus solving the wraparound problem present in the
previous implementation.  The size of the namespace node
descriptor was reduced by 2 bytes as a result.

Removed the UINT32_BIT and UINT16_BIT types that were used
for the bitfield flag definitions within the headers for
the predefined ACPI tables.  These have been replaced by
UINT8_BIT in order to increase the code portability of
the subsystem.  If the use of UINT8 remains a problem,
we may be forced to eliminate bitfields entirely because
of a lack of portability.

Alexey Starikovksiy enhanced the performance of
acpi_ut_update_object_reference.  This is a frequently used
function and this improvement increases the performance
of the entire subsystem.

Alexey Starikovskiy fixed several possible memory leaks
and the inverse - premature object deletion.

Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 32 insertions, 26 deletions

diff --git a/include/acpi/actbl.h b/include/acpi/actbl.h
index b5cdcca444c8..c1e9110c3661 100644
--- a/include/acpi/actbl.h
+++ b/include/acpi/actbl.h
@@ -86,15 +86,15 @@
  */
 struct rsdp_descriptor         /* Root System Descriptor Pointer */
 {
-        char                            signature [8];          /* ACPI signature, contains "RSD PTR " */
-        u8                              checksum;               /* To make sum of struct == 0 */
-        char                            oem_id [6];             /* OEM identification */
-        u8                              revision;               /* Must be 0 for 1.0, 2 for 2.0 */
-        u32                             rsdt_physical_address;  /* 32-bit physical address of RSDT */
-        u32                             length;                 /* XSDT Length in bytes including hdr */
-        u64                             xsdt_physical_address;  /* 64-bit physical address of XSDT */
-        u8                              extended_checksum;      /* Checksum of entire table */
-        char                            reserved [3];           /* Reserved field must be 0 */
+        char                            signature[8];           /* ACPI signature, contains "RSD PTR " */
+        u8                              checksum;               /* ACPI 1.0 checksum */
+        char                            oem_id[6];              /* OEM identification */
+        u8                              revision;               /* Must be (0) for ACPI 1.0 or (2) for ACPI 2.0+ */
+        u32                             rsdt_physical_address;  /* 32-bit physical address of the RSDT */
+        u32                             length;                 /* XSDT Length in bytes, including header */
+        u64                             xsdt_physical_address;  /* 64-bit physical address of the XSDT */
+        u8                              extended_checksum;      /* Checksum of entire table (ACPI 2.0) */
+        char                            reserved[3];            /* Reserved, must be zero */
 };
 
 
@@ -107,15 +107,15 @@ struct acpi_common_facs          /* Common FACS for internal use */
 
 
 #define ACPI_TABLE_HEADER_DEF   /* ACPI common table header */ \
-        char                            signature [4];          /* ACPI signature (4 ASCII characters) */\
-        u32                             length;                 /* Length of table, in bytes, including header */\
+        char                            signature[4];           /* ASCII table signature */\
+        u32                             length;                 /* Length of table in bytes, including this header */\
         u8                              revision;               /* ACPI Specification minor version # */\
         u8                              checksum;               /* To make sum of entire table == 0 */\
-        char                            oem_id [6];             /* OEM identification */\
-        char                            oem_table_id [8];       /* OEM table identification */\
+        char                            oem_id[6];              /* ASCII OEM identification */\
+        char                            oem_table_id[8];        /* ASCII OEM table identification */\
         u32                             oem_revision;           /* OEM revision number */\
-        char                            asl_compiler_id [4];    /* ASL compiler vendor ID */\
-        u32                             asl_compiler_revision;  /* ASL compiler revision number */
+        char                            asl_compiler_id [4];    /* ASCII ASL compiler vendor ID */\
+        u32                             asl_compiler_revision;  /* ASL compiler version */
 
 
 struct acpi_table_header         /* ACPI common table header */
@@ -139,8 +139,12 @@ struct multiple_apic_table
 {
         ACPI_TABLE_HEADER_DEF                           /* ACPI common table header */
         u32                             local_apic_address;     /* Physical address of local APIC */
-        u32                             PCATcompat      : 1;    /* A one indicates system also has dual 8259s */
-        u32                             reserved1       : 31;
+
+        /* Flags (32 bits) */
+
+        u8                              PCATcompat      : 1;    /* 00:    System also has dual 8259s */
+        u8                                              : 7;    /* 01-07: Reserved, must be zero */
+        u8                              reserved1[3];           /* 08-31: Reserved, must be zero */
 };
 
 /* Values for Type in APIC_HEADER_DEF */
@@ -180,16 +184,18 @@ struct apic_header
 #define TRIGGER_RESERVED        2
 #define TRIGGER_LEVEL           3
 
-/* Common flag definitions */
+/* Common flag definitions (16 bits each) */
 
 #define MPS_INTI_FLAGS \
-        u16                             polarity        : 2;    /* Polarity of APIC I/O input signals */\
-        u16                             trigger_mode    : 2;    /* Trigger mode of APIC input signals */\
-        u16                             reserved1       : 12;   /* Reserved, must be zero */
+        u8                              polarity        : 2;    /* 00-01: Polarity of APIC I/O input signals */\
+        u8                              trigger_mode    : 2;    /* 02-03: Trigger mode of APIC input signals */\
+        u8                                              : 4;    /* 04-07: Reserved, must be zero */\
+        u8                              reserved1;              /* 08-15: Reserved, must be zero */
 
 #define LOCAL_APIC_FLAGS \
-        u32                             processor_enabled: 1;   /* Processor is usable if set */\
-        u32                             reserved2       : 31;   /* Reserved, must be zero */
+        u8                              processor_enabled: 1;   /* 00:    Processor is usable if set */\
+        u8                                              : 7;    /* 01-07: Reserved, must be zero */\
+        u8                              reserved2;              /* 08-15: Reserved, must be zero */
 
 /* Sub-structures for MADT */
 
@@ -238,7 +244,7 @@ struct madt_local_apic_nmi
 struct madt_address_override
 {
         APIC_HEADER_DEF
-        u16                             reserved;               /* Reserved - must be zero */
+        u16                             reserved;               /* Reserved, must be zero */
         u64                             address;                /* APIC physical address */
 };
 
@@ -246,7 +252,7 @@ struct madt_io_sapic
 {
         APIC_HEADER_DEF
         u8                              io_sapic_id;            /* I/O SAPIC ID */
-        u8                              reserved;               /* Reserved - must be zero */
+        u8                              reserved;               /* Reserved, must be zero */
         u32                             interrupt_base;         /* Glocal interrupt for SAPIC start */
         u64                             address;                /* SAPIC physical address */
 };
@@ -257,7 +263,7 @@ struct madt_local_sapic
         u8                              processor_id;           /* ACPI processor id */
         u8                              local_sapic_id;         /* SAPIC ID */
         u8                              local_sapic_eid;        /* SAPIC EID */
-        u8                              reserved [3];           /* Reserved - must be zero */
+        u8                              reserved[3];            /* Reserved, must be zero */
         LOCAL_APIC_FLAGS
         u32                             processor_uID;          /* Numeric UID - ACPI 3.0 */
         char                            processor_uIDstring[1]; /* String UID  - ACPI 3.0 */